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Dioscorea deltoidea - Wall. ex Griseb.

Common Name Yam
Family Dioscoreaceae
USDA hardiness Coming soon
Known Hazards Edible species of Dioscorea have opposite leaves whilst poisonous species have alternate leaves[174].
Habitats Forests and humus-rich soils, 1700 - 2800 metres in Kashmir[145]. Broad-leaved forests and scrub forests at elevations of 2000 - 3100 metres in western China[266].
Range E. Asia - Himalayas from Kashmir and Punjab eastwards to Nepal and China.
Edibility Rating    (2 of 5)
Other Uses    (0 of 5)
Weed Potential No
Medicinal Rating    (2 of 5)
Care (info)
Moist Soil Semi-shade Full sun
Dioscorea deltoidea Yam


Dioscorea deltoidea Yam

 

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Summary


Physical Characteristics

 icon of manicon of flower
Dioscorea deltoidea is a PERENNIAL CLIMBER growing to 3 m (9ft 10in). It is in flower from September to October. The species is dioecious (individual flowers are either male or female, but only one sex is to be found on any one plant so both male and female plants must be grown if seed is required). . The plant is not self-fertile.
Suitable for: light (sandy), medium (loamy) and heavy (clay) soils and prefers well-drained soil. Suitable pH: mildly acid, neutral and basic (mildly alkaline) soils. It can grow in semi-shade (light woodland) or no shade. It prefers moist soil.

UK Hardiness Map US Hardiness Map

Synonyms

Habitats

Woodland Garden Sunny Edge; Cultivated Beds;

Edible Uses

Edible Parts: Root
Edible Uses:

Tuber - cooked[2, 177]. A slightly bitter flavour, it is usually boiled with some wood ash in order to remove the bitterness[272]. Some caution is advised. See notes below on other uses of the root and above on toxicity.

References   More on Edible Uses

Medicinal Uses

Plants For A Future can not take any responsibility for any adverse effects from the use of plants. Always seek advice from a professional before using a plant medicinally.
Contraceptive  Miscellany  Parasiticide

The juice of the root tuber istaken in the evening in the treatment of roundworm[272]. It is also used to alleviate constipation[272]. The roots of most, if not all, members of this genus, contains diosgenin[222, 240]. This is widely used in modern medicine in order to manufacture progesterone and other steroid drugs. These are used as contraceptives and in the treatment of various disorders of the genitary organs as well as in a host of other diseases such as asthma and arthritis[222]. The roots of this species contain an average of 4.8% diosgenin[240].

References   More on Medicinal Uses

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Other Uses

Miscellany  Parasiticide  Soap

A soap is obtained from the tuber[145]. This soap is due to the presence of poisonous saponins in the root[240, K]. The soap is also used as a body wash to kill lice[145, 240].

Special Uses

References   More on Other Uses

Cultivation details

We have very little information on this species and do not know if it will be hardy in Britain. It is unlikely to succeed in any but the mildest areas. It is cultivated for its edible root in India[2]. The following notes are based on the general needs of the genus. Easily grown in a fertile well-drained soil in a sunny position or light shade[200]. Prefers a rich light soil[1]. Plants produce tubercles (small tubers that are formed in the leaf axils of the stems), and can be propagated by this means[K]. A climbing plant that supports itself by twining around the branches of other plants[219]. Dioecious. Male and female plants must be grown if seed is required.

References   Carbon Farming Information and Carbon Sequestration Information

Temperature Converter

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Propagation

Seed - sow March to April in a sunny position in a warm greenhouse and only just cover. It germinates in 1 - 3 weeks at 20°c[175]. Prick out the seedlings as soon as they are large enough to handle and grow on in a greenhouse for their first year. Plant out in late spring as the plant comes into new growth. Basal stem cuttings in the summer[37]. Division in the dormant season, never when in growth[1]. The plant will often produce a number of shoots, the top 5 - 10 cm of the root below each shoot can be potted up to form a new plant whilst the lower part of the root can possibly be eaten[K]. Tubercles (baby tubers) are formed in the leaf axils. These are harvested in late summer and early autumn when about the size of a pea and coming away easily from the plant. They should be potted up immediately in individual pots in a greenhouse or cold frame. Plant out in early summer when in active growth[K].

Other Names

If available other names are mentioned here

Found In

Countries where the plant has been found are listed here if the information is available

Weed Potential

Right plant wrong place. We are currently updating this section. Please note that a plant may be invasive in one area but may not in your area so it’s worth checking.

Conservation Status

IUCN Red List of Threatened Plants Status :

Related Plants
Latin NameCommon NameHabitHeightHardinessGrowthSoilShadeMoistureEdibleMedicinalOther
Dioscorea alataWater Yam, Purple yam, Greater yam, White yamPerennial Climber15.0 10-12 FLMHSM412
Dioscorea batatasChinese YamPerennial3.0 4-11  LMHSNM553
Dioscorea bulbiferaAerial Yam, Air PotatoPerennial Climber10.0 9-12 FLMHSNM420
Dioscorea cayennensisYellow Yam, Yellow Guinea yamPerennial Climber10.0 10-12 FLMSNM400
Dioscorea esculentaLesser Yam, Potato Yam, Chinese Yam, Wild YamPerennial Climber3.0 8-12 FLMSNM400
Dioscorea japonicaGlutinous Yam, Japanese yamPerennial Climber3.0 7-12  LMHNM420
Dioscorea kamoonensis Perennial Climber2.5 -  LMHNM21 
Dioscorea tokoro Perennial Climber0.0 -  LMHNM22 
Dioscorea trifidaCush Cush Yam, Sweet yamPerennial Climber3.0 10-12 FLMHSNM400
Dioscorea villosaWild YamPerennial Climber3.0 5-9  LMHNM24 
Tamus communisBlack BryonyPerennial Climber3.5 4-8 MLMHSNM12 

Growth: S = slow M = medium F = fast. Soil: L = light (sandy) M = medium H = heavy (clay). pH: A = acid N = neutral B = basic (alkaline). Shade: F = full shade S = semi-shade N = no shade. Moisture: D = dry M = Moist We = wet Wa = water.

 

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Author

Wall. ex Griseb.

Botanical References

266

Links / References

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Readers comment

latika lilhore   Sat Sep 5 2009

how do we micropropagate this plant is this an endengered species

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